There is considerable similarity in the grammar structure and linguistic form between Korean and Japanese, but their corresponding relations are complex due to both similarities and differences in the end of sentence form such as “Noda” and “Wakeda” that are modality forms. It is difficult to figure out the meanings of grammar forms right in which there is no one-to-one correspondence between Korean and Japanese and further not simple at all to translate them. Unless there is the right understanding of semantic differences between “Noda” and “Wakeda,” both of which exhibit a mental attitude, it will be difficult to translate them into Korean clearly. The judgment will depend on whether to take a linguistic perspective that translation should reflect the meanings of every word clearly or a practice one that translation should suffice to deliver overall meanings. There is, however, a basic need to be loyal to vocabulary during translation even in the position that translation should suffice to deliver meanings. If there is, in particular, the intention of the speaker(writer) that has chosen the form, his or her intention should be respected. The translations of “Wakeda” into Korean have been arbitrary mostly, and its original meanings have not been reflected right in many cases. There may be many different ways to translate it, but its translations into Korean must reflect its meanings of conclusion, understanding or substitution in order to convey its meanings correctly. It is necessary to make use of sentence-ending particles, adverbs, conjunctions, and exclamations to accompany “것이다” in the translation of “Wakeda” into Korean as well as “것이다” alone. If one assumes there will be no big differences in Korean sentences according to its translation and accordingly chooses to omit its translation in moderation or be liberal with its translation, he or she will fail to convey the intention of the speaker(writer) and contribute to the decreased literary value of literary works through the simplification of its meanings.